Customer Acquisition Cost to Lifetime Value

Customer Acquisition Cost to Lifetime Value

Understanding and Configuring Customer Acquisition Cost to Lifetime Value (CAC to LTV)

What is CAC to LTV?

Customer Acquisition Cost to Lifetime Value (CAC to LTV) is a key profitability metric that compares how much it costs you to acquire a new customer against the total revenue you can expect to earn from that customer over their lifetime.

In Acanthis, this metric is visualised through:

  • A monthly bar chart displaying:

    • Lifetime Value (LTV) per customer (from Shopify)

    • Customer Acquisition Cost (CAC) per customer (from Xero advertising spend)

  • A trend line showing the LTV/CAC Ratio month-by-month.

  • CAC = Advertising Spend ÷ Number of New Customers

  • LTV = Average Revenue per Customer × Average Purchase Frequency × Average Customer Lifespan

  • LTV/CAC Ratio = Lifetime Value ÷ Customer Acquisition Cost

Why is CAC to LTV Important?

Tracking CAC to LTV gives you clear insight into whether your customer acquisition strategies are profitable and sustainable.

Key reasons CAC to LTV matters:

  • Profitability Health Check: A strong LTV/CAC ratio means you're earning far more from customers than it costs to acquire them.

  • Marketing Efficiency: Helps you optimise ad spend by focusing on channels and campaigns that deliver profitable customers.

  • Sustainable Growth: Indicates whether your growth is scalable without destroying margins.

  • Investment Readiness: Investors often use LTV/CAC as a core benchmark for assessing the financial health of businesses.

How CAC to LTV Helps Your E-commerce Business

By tracking CAC to LTV, you can:

  • Allocate marketing budget toward the most profitable acquisition strategies.

  • Improve customer retention programs to boost lifetime value.

  • Detect when acquisition costs are rising too fast compared to customer value.

  • Make informed scaling decisions based on profitability, not just revenue.

How CAC to LTV is Set Up in Acanthis

  • LTV is automatically pulled from your Shopify integration.

  • CAC is calculated by pulling advertising spend data from your Xero accounting records (specifically from your marketing or advertising expense accounts).

Alert

Important:

  • Ensure Shopify and Xero are both correctly connected to Acanthis through Settings > Integrations.

  • Advertising expenses must be properly categorised in Xero to ensure accurate CAC calculations.